Index: trunk/psphot/src/psphotEfficiency.c
===================================================================
--- trunk/psphot/src/psphotEfficiency.c	(revision 34318)
+++ trunk/psphot/src/psphotEfficiency.c	(revision 34319)
@@ -401,12 +401,17 @@
                 source->peak->yf = y;
                 source->modelPSF = pmModelFromPSFforXY(psf, x, y, 2.0 * sqrtf(sig));
-                source->type = PM_SOURCE_TYPE_STAR;
-
-		source->modelPSF->fitRadius = sourceRadius;
-		source->apRadius = sourceRadius;
-
-                numFound++;
-                psArrayAdd(sources, sources->n, source);
-                psArrayAdd(fakeSourcesAll, fakeSourcesAll->n, source);
+                if (source->modelPSF) {
+                    source->type = PM_SOURCE_TYPE_STAR;
+
+                    source->modelPSF->fitRadius = sourceRadius;
+                    source->apRadius = sourceRadius;
+
+                    numFound++;
+                    psArrayAdd(sources, sources->n, source);
+                    psArrayAdd(fakeSourcesAll, fakeSourcesAll->n, source);
+                } else {
+                    psLogMsg("psphot", PS_LOG_WARN, "pmModelFromPSFforXY failed for sig: %f x: %6.1f y: %6.1f\n", 
+                        sig, x, y);
+                }
                 psFree(source);
             }